Hybrid Whole House RO Drinking Reverse Osmosis System 50 GPD Water Filter Tank. 1/2” input and output. The item “Hybrid In/Outdoor Whole House /Reverse Osmosis System RO Water Filter Tank 50GPD” is in sale since Sunday, September 07, 2014. This item is in the category “Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Filters”. The seller is “purewaterclub*com” and is located in Rowland Heights, California. This item can be shipped to United States.